F_03__2 - BioG109 November4,2003 Prelim#2

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BioG 109 November 4, 2003 Prelim #2 Part 1. MULTIPLE CHOICE. Questions 1-45. CHOOSE THE ONE BEST ANSWER. CIRCLE IT ON YOUR QUESTION PAPER. THEN MARK YOUR CHOICE CAREFULLY ON THE ANSWER SHEET. A CHOICE MAY HAVE AN ELEMENT OF TRUTH BUT IS NOT NECESSARILY THE RIGHT (i.e., BEST) ANSWER. 1. Strictly speaking, the phrase "like begets like" should apply to: A) all forms of reproduction B) sexual reproduction only C) asexual reproduction in a population with exceptionally high mutation rates D) species in which there are no mutations E) asexual reproduction in a population with NO mutations 2. Judging from recent studies using DNA sequencing, the closest living relatives of whales are: A) certain carnivores in marine environments B) hippos C) wild relatives of cows D) elephant seals E) endothermic fishes 3. Two chromosomes in a nucleus that carry loci for the same trait in the same positions on the chromosomes but specify different versions of the same traits constitute a pair of: A) homologous chromosomes B) heterologous chromosomes C) polyploids D) monophyletic chromosomes E) translocations 4. Which of the following is a difference between mitosis and meiosis? A) in mitosis four daughter cells are produced, whereas in meiosis two daughter cells are produced B) in mitosis two daughter cells are produced, whereas in meiosis four daughter cells are produced C) cells produced by mitosis are diploid, whereas cells produced by meiosis are haploid D) in mitosis cell division happens once, whereas in meiosis cell division happens twice E) all of the above except A Page 1 of 10 Continued on back
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BioG 109 November 4, 2003 Prelim #2 5. Assuming that in dogs black color is dominant and brown recessive, what would be the phenotype of a female you would mate with a black male dog in order to determine HIS genotype? A) brown B) heterozygous black C) homozygous black D) pale gray E) no such cross is possible 6. Imagine that tail length in a lizard species is controlled by a single gene. You mate a lizard homozygous for long tail with a lizard homozygous for short tail, and get numerous offspring each with an intermediate length tail. This pattern of phenotypic expression is most likely an example of which of the following? A) blending B) incomplete dominance C) paedomorphosis D) polygenes E) crossing over 7. Imagine that tail length in a lizard species is controlled by a single gene, just as in question 6, and that a cross yields 25 short-tailed lizards and 25 lizards with intermediate length tails. The likely genotypes of the parents were: A) homozygous father, homozygous mother B) homozygous father, polyploid mother C) heterozygous father, homozygous mother D) heterozygous father, heterozygous mother E) polyploid father, heterozygous mother 8. The various features of Blue-footed Boobies that are most distinctive compared to most familiar U. S. birds are likely adaptations for: A) flight B) terrestrial locomotion C) a diet of sea stars D) a marine environment E) sexual selection
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F_03__2 - BioG109 November4,2003 Prelim#2

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